JP2016172992A - Pipe installation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe installation device that maintains a water cut-off performance between an outer peripheral surface of a support substrate and an inner peripheral surface of a cylindrical support body, and reduces a load when right and left sides of the support substrate is swung in a front-rear direction.SOLUTION: A support device includes a support body 120 supporting a rotary excavation body, and an expandable cylindrical water cut-off member 161. The support body 120 includes a cylindrical support body, and a plate-form support substrate 30 supporting the rotary excavation body and being supported swingably inside the cylindrical support body. The rotary excavation body is connected to the support substrate 30, and the support substrate 30 is configured to have a pair of outer surfaces opposite a second pair of inner surfaces of a pipe fitted on the cylindrical support body to allow the cylindrical support body to swing in a front-rear direction, and to make the rotary excavation body swingable in a direction orthogonal to the second inner surfaces of the pipe that are parallel to and face each other. The cylindrical water cut-off member 161 has an opening edge 162 on one end of a cylinder fixed on an opening edge on one end of the cylindrical support body, and an opening edge 164 on the other end of the cylinder fixed on a front surface of the support substrate 30.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a pipe installation device for installing a pipe having a square section in the ground.

  In order to install a pipe with a square cross section in the ground, a rotary excavator positioned on the front side of the pipe can be swung left and right with reference to the propulsion direction of the pipe into the ground via a support device. A support device for swinging a rotary excavator to the left and right in a pipe installation device that is supported on the inner side of the pipe and configured to rotate about a rotation center line that intersects the propulsion direction of the pipe. And a support substrate to which the rotary excavator is connected, and an inner peripheral surface that rotatably supports the support substrate so that the left and right sides of the support substrate can swing in the front-rear direction, and that faces the outer peripheral surface of the support substrate There is known a tube installation device provided with a cylindrical support body having (see, for example, Patent Document 1).

JP 2013-1000065 A

In the pipe installation device of Patent Document 1, a water-stopping member such as water-stopping rubber is provided on the outer peripheral surface of the support substrate for maintaining a watertight state between the outer peripheral surface of the support substrate and the inner peripheral surface of the cylindrical support. I am doing so. Therefore, every time the left and right sides of the support substrate are swung in the front-rear direction, friction occurs between the water stop member and the inner peripheral surface of the cylindrical support body. The load increases locally. Moreover, it becomes easy to remove the said water stop member from the groove | channel in which the water stop member was mounted | worn.
The present invention can maintain the water stop performance between the outer peripheral surface of the support substrate and the inner peripheral surface of the cylindrical support body, and can reduce the load when the left and right sides of the support substrate are swung in the front-rear direction. It aims at providing the pipe installation apparatus comprised in this way.

According to the present invention, a pipe having a rectangular cross section, a rotary excavator that rotates around a rotation center line that is positioned in front of one end opening of the pipe and intersects the propulsion direction of the pipe, and the rotary excavator as a pipe A supporting device to be supported and driving means are provided, and the pipe is propelled and installed in the ground by applying a driving force to the rotary excavator and the pipe while rotating the rotary excavator and excavating the natural ground. In the pipe installation device, the support device includes a support body that rotatably supports the rotary excavation body, and an extendable cylindrical water stop member, and the support body has a center line of the cylinder along the center line of the pipe. A cylindrical support body installed on the front side in the pipe so as to be extended, and a flat support substrate that supports the rotary excavation body and is swingably supported inside the cylindrical support body. The excavation body is provided so as to protrude forward from the front surface of the support substrate. The support substrate is connected to the support substrate via a support column, and the support substrate is attached to the cylindrical support so that the pair of outer surfaces facing the other pair of inner surfaces of the tube can swing in the longitudinal direction of the cylindrical support. The rotary excavator is configured to be swingable in a direction orthogonal to the other pair of inner surfaces of the pipe facing each other in parallel, and the cylindrical water-stopping member has one end opening edge of the cylinder at one end of the cylindrical support body. In addition to being fixed to the opening edge and the other end opening edge of the cylinder being fixed to the front surface of the support substrate, the cylindrical water blocking member is interposed between the inner surface of the cylindrical support body and the outer surface of the support substrate. Since it is configured to prevent the water from moving to the rear of the cylindrical support, the water stopping performance between the outer peripheral surface of the support substrate and the inner peripheral surface of the cylindrical support can be maintained and the support substrate The load when swinging the left and right in the front-rear direction can be reduced.
The cylindrical water stop member has one end opening edge of the cylinder fixed to the one end opening edge of the cylindrical support and the other end opening edge of the cylinder fixed to the outer peripheral edge of the front surface of the support substrate. The water stopping performance between the outer peripheral surface and the inner peripheral surface of the cylindrical support can be maintained, the load when swinging the left and right of the support substrate in the front-rear direction can be reduced, and the front side of the support substrate can be reduced. A lot of excavation sludge can be taken in and the sludge efficiency can be improved.
Since the tubular water-stopping member is a bellows tubular water-stopping member, it has excellent shape retention performance when expanded and contracted, and the bellows tubular water-stopping member is provided between the outer peripheral surface of the support substrate and the inner peripheral surface of the cylindrical support. The member can be prevented from being bitten, and the reliability of the water stop device can be improved.

A cross-sectional view of a pipe installation device (embodiment 1). The longitudinal cross-sectional view of a pipe installation apparatus (embodiment 1). The figure which looked at the rear surface side of the support substrate from back side (embodiment 1). The perspective view which looked at the support apparatus from the front side (embodiment 1). The perspective view which looked at the support apparatus from the back side (embodiment 1). The figure which shows the installation method of the pipe | tube in the ground (Embodiment 1). The disassembled perspective view which decomposes | disassembles and shows a support body and a water stop member (Embodiment 1). Operation | movement explanatory drawing of a water stop apparatus (Embodiment 1). Operation | movement explanatory drawing of a water stop apparatus (Embodiment 1). Operation | movement explanatory drawing of a water stop apparatus (Embodiment 1).

Embodiment 1
Based on FIG. 1 thru | or FIG. 10, the structure and operation | movement of the pipe installation apparatus 1 by Embodiment 1 for installing the pipe | tube 2 in the underground 10 are demonstrated.
In the following, the upper side in FIG. 1 is defined as the head or front side of the tube 2 or the tube installation device 1, the lower side in FIG. 1 is defined as the rear side of the tube 2 or the tube installation device 1, and the left and right sides in FIG. The tube 2 and the tube installation device 1 are defined as the left and right sides, and the direction orthogonal to the paper surface of FIG. 1 is defined as the tube 2 and the tube installation device 1 as the upper and lower sides. That is, as shown by the arrows in FIG. 4 and FIG.

First, the configuration of the pipe installation device 1 will be described.
As shown in FIG. 1, the pipe installation device 1 includes a pipe 2 and a drilling device 3.
The excavating device 3 includes an excavating machine 26, a water stop device 150, a friction reducing device, a propulsion device 70, a water supply device 75, a mud drain device 76, and a control device 65.

The pipe 2 installed in the ground by the excavator 3 is, for example, a pipe 2 having a rectangular cross section perpendicular to the center line of the pipe 2. The pipe 2 is a first pipe 6 that enters the ground first, and a plurality of subsequent pipes (not shown) that are sequentially connected to the first pipe 6 backward.
One end opening edge 6z of the leading pipe 6 is formed in a tapered inclined surface so that it can easily bite into the natural ground 99.

The rotary excavation body 46 is positioned in front of the one end opening 6t, which is the front end (front end) of the front pipe 6, and a support device 110 that supports the rotary excavation body 46 so as to be rotatable and swingable is provided on the front pipe 6. It is installed on the front side in the pipe.
The rotary excavator 46 is configured to rotate around a rotation center line L that intersects the propulsion direction F of the leading pipe 6 into the underground 10.
The rotary excavator 46 is configured to be swingable in the left-right direction and the up-down direction about the center line 6x of the leading pipe 6.

  The excavating machine 26 includes a support device 110, a connecting support column 40, a rotating unit 41 including a rotating excavating body 46, a rotation driving source of the rotating excavating body 46, and a swing driving means of the rotating excavating body 46. Prepare.

  As shown in FIG. 2 and FIG. 7, the support device 110 is provided on each of the upper inner surface 6 a and the lower inner surface 6 b (one pair of inner surfaces) facing each other in parallel on the front inner surface on the one end opening 6 t side of the leading pipe 6. A pair of curved concave surfaces 111; 111, a support body 120 that supports the rotary excavation body 46 via the connecting column 40, a pair of curved convex surfaces 121; 121 provided on the support body 120, and pipe side engagement Part 122, support side engagement part 123, support side rotation support part 124 in which tube side engagement part 122 and support side engagement part 123 engage with each other to form a rotation center 120C of support 120, It is the structure provided with. When the pipe installation device 1 is stationary, the rotary excavator 46 is supported by the support device 110. When the rotary excavator 46 is driven to excavate, the top pipe 6 is rotary excavated. The body 46 is pulled. In the present invention, all of these states are defined as “support”.

As shown in FIG. 7, the curved concave surface 111 is a curved concave surface that curves along the center line 6x of the leading tube 6, and the other end 112 of the arc of the curved concave surface 111 is the inner surface (upper inner surface 6 a or lower surface) of the leading tube 6. One end 113 of the arc of the curved concave surface 111 is continuous with the inner surface 6b) and a surface 125 parallel to the upper inner surface 6a and the lower inner surface 6b. That is, the curved concave surface 111 is smoothly continuous from the inner surface (upper inner surface 6a or lower inner surface 6b) of the leading tube 6 and extends to the front side of the leading tube 6 to open the center line 6x of the leading tube 6 and one end opening of the leading tube 6. It is a curved concave surface formed so as to approach 6t.
The pair of curved concave surfaces 111; 111 are curved concave surfaces that are symmetrical with respect to a plane that is parallel to the upper inner surface 6a and the lower inner surface 6b of the leading tube 6 and includes the center line 6x of the leading tube 6 as a symmetric surface.
The curved concave surface 111 has a curved concave surface that is curved along the center line 6x of the leading tube 6 and the left inner surface 6c and the right inner surface 6d between the left inner surface 6c and the right inner surface 6d (the other pair of inner surfaces) of the leading tube 6. It is provided so as to extend continuously in a direction orthogonal to.
That is, a member in which the curved concave surface 111 and the surface 125 are formed, that is, a long member having a cross-sectional shape shown in FIG. 2, is arranged so as to extend in a direction orthogonal to the left inner surface 6c and the right inner surface 6d. By fixing to the upper inner surface 6a and the lower inner surface 6b, the top pipe 6 having the curved concave surface 111 on each of the upper inner surface 6a and the lower inner surface 6b is formed.
In other words, as shown in FIG. 2, the curved concave surface 111 is a circular arc surface that is an outer peripheral surface of a virtual cylinder whose center line is the rotation center 120 </ b> C of the support 120 formed by the support rotation support portion 124. It is formed by the arc surface which comprises a part. That is, each curved concave surface 111; 111 is a predetermined angular range around the center line in a virtual cylinder having a center line orthogonal to the left inner surface 6c and the right inner surface 6d (the other pair of inner surfaces facing each other in parallel) of the leading tube 6. It is formed by the member which forms the outer peripheral surface.
In the first embodiment, each curved concave surface 111; 111 has a center line orthogonal to the left inner surface 6c and the right inner surface 6d of the leading tube 6 and the outer circumferential surface is spaced 180 ° from the upper inner surface 6a of the leading tube 6. It is formed by a member that forms an outer peripheral surface of a predetermined angular range around a center line in a virtual cylinder in contact with the lower inner surface 6b. For example, one curved concave surface 111 is 30 around the center line of the virtual cylinder in the direction toward the one end opening 6t side of the top tube 6 from the position in contact with the top inner surface 6a of the top tube 6 on the outer peripheral surface of the above-described virtual column. The other curved concave surface 111 is formed by a member that forms an outer peripheral surface having an angle range of °, and the other curved concave surface 111 is open at one end 6t of the front tube 6 from a position in contact with the lower inner surface 6b of the front tube 6 on the outer peripheral surface of the virtual cylinder. It is formed by a member that forms an outer peripheral surface in an angle range of 30 ° around the center line of the virtual cylinder in the side direction.

  The support body 120 includes a flat support substrate 30 that supports the rotary excavation body 46 via the connecting support column 40, and a cylindrical support body 31 that supports the support substrate 30 in a swingable manner.

The cylindrical support 31 is installed on the front side in the top tube 6 so that the center line of the tube of the cylindrical support 31 extends along the center line 6x of the top tube 6. For example, the cylindrical support 31 is formed of a cylindrical body having a rectangular cross section, and the top tube is arranged so that the center line of the tube of the cylindrical support 31 and the center line 6x of the tube of the top tube 6 are the same. 6 is installed inside the front side.
The upper outer surface and the lower outer surface of the cylindrical support 31 facing the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6 are curved along the center line of the tube of the cylindrical support 31 and guided to the curved concave surfaces 111; The curved convex surface 121; 121 is formed.
The curvature radius of the curved convex surface 121 is formed to be slightly smaller than the curvature radius of the curved concave surface 111 described above.
That is, like the curved concave surface 111, the curved convex surface 121 is a part of a circular arc surface that is an outer peripheral surface of a virtual cylinder centering on the rotation center 120C of the support 120 formed by the support rotation support portion 124. It is formed by the arc surface which comprises. That is, each curved convex surface 121; 121 is formed by an outer peripheral surface having a predetermined angular range around a center line in a virtual cylinder having a center line orthogonal to the left inner surface 6c and the right inner surface 6d of the leading tube 6.
In the first embodiment, each curved convex surface 121; 121 is based on the positions of the outer peripheral surfaces of a virtual cylinder having a center line perpendicular to the left inner surface 6c and the right inner surface 6d of the leading pipe 6 separated from each other by 180 °. It is formed by the outer peripheral surface of a predetermined angle range around the center line in the virtual cylinder. For example, each curved convex surface 121; 121 is formed by an outer peripheral surface having an angular range of about 60 ° around the center line of the virtual cylinder described above.

The left outer surface and the right outer surface of the cylindrical support 31 facing the left inner surface 6c and the right inner surface 6d of the leading tube 6 are formed in a plane parallel to the left inner surface 6c and the right inner surface 6d of the leading tube 6.
The left inner surface 31c and the right inner surface 31d of the cylindrical support 31 facing the left inner surface 6c and the right inner surface 6d of the top tube 6 are curved concave surfaces that are curved along the center line of the tube of the cylindrical support 31, or the top tube 6 is formed in a plane parallel to the left inner surface 6c and the right inner surface 6d.
The upper and lower outer surfaces of the cylindrical support 31 facing the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6 are formed in a plane parallel to the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6.
The upper inner surface and the lower inner surface of the cylindrical support 31 facing the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6 are formed in a plane parallel to the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6.

The support substrate 30 is formed of a rectangular flat plate whose outer peripheral shape is slightly smaller than the inner peripheral dimension of the cylindrical support 31 that matches the inner peripheral shape of the cylindrical support 31.
The flat plate forming the support substrate 30 has a thickness along the front-rear direction of the top tube 6, and the left and right outer surfaces (end surfaces) 30 a; 30 b of the flat plate are curved convex surfaces that curve along the center line of the support substrate 30. Alternatively, it is formed in a plane parallel to the left inner surface 6c and the right inner surface 6d of the leading pipe 6.

For example, cylindrical protrusions 37; 37 (see FIG. 2) are provided at the center position between the left and right of the upper and lower outer surfaces of the flat plate forming the support substrate 30. The projection 37; 37 is fitted into a circular hole 38; 38 formed on the upper and lower inner surfaces of the cylindrical support 31 so as to be rotatable about the center line of the projection 37; The projections 37; 37 function as the rotation center line 30x of the support substrate 30, and the left and right ends of the support substrate 30 are configured to be swingable in the front-rear direction with the rotation center line 30x as the rotation center. That is, the support substrate 30 is attached to the cylindrical support 31 so that the pair of left and right outer surfaces 30a; 30b facing the pair of left and right inner surfaces facing each other of the cylindrical support 31 can swing in the front-rear direction. .
The rotating excavator 46 is connected to the support substrate 30 via a connection support column 40 provided so as to protrude forward from the front surface 30 f of the support substrate 30, whereby the left and right outer surfaces of the support substrate 30. When the rotary excavator 46 swings in the front-rear direction, the rotary excavator 46 is perpendicular to the left inner surface 6c and the right inner surface 6d of the head pipe 6, that is, the rotary excavator 46 is centered on the center line 6x of the head pipe 6. It is configured to be swingable in the left-right direction.

As shown in FIG. 1; FIG. 3, the support substrate 30 is formed with a column holding through hole 13, a mud pipe holding through hole 14, and a water supply pipe holding through hole 15 that penetrate the flat plate of the support substrate 30 in the front-rear direction. The
As shown in FIG. 3, for example, the support holding through-hole 13 is formed so as to pass through the center portion of the support substrate 30, and the drainage pipe holding through-hole 14 passes through the left and right sides of the lower side of the support substrate 30. Two are provided.
Two water supply pipe holding through holes 15 are provided so as to penetrate the left and right sides of the upper side of the support substrate 30.
The strut holding through hole 13 is held in a fixed state with the strut 42 of the connecting strut portion 40 of the excavating machine 26 penetrating therethrough. That is, since the excavating machine 26 is fixed to the support substrate 30, the excavating machine is supported by the support substrate 30 so as to be swingable in the left-right direction and the vertical direction about the center line of the top pipe.
The mud pipe holding through holes 14; 14 are held in a fixed state with the tip of the mud pipe 76c penetrating therethrough.
The water supply pipe holding through-holes 15; 15 are held in a fixed state in a state where the distal end portion of the water supply pipe 75c penetrates.

The support side engaging portion 123 of the support device 110 is formed by circular protrusions provided on the left outer surface 126 and the right outer surface 127 of the cylindrical support 31 facing the parallel surfaces of the left inner surface 6c and the right inner surface 6d of the leading pipe 6 facing each other. It is formed. The center of the circle of the circular protrusion is located at the center between the front and rear and the top and bottom of the left outer surface 126 and the right outer surface 127 of the cylindrical support 31, that is, the center of the left outer surface 126 and the right outer surface 127 of the cylindrical support 31. Is done.
The pipe side engaging portion 122 is formed by a curved concave portion provided on the left inner surface 6c and the right inner surface 6d of the leading tube 6 and receiving a circular projection as the support member engaging portion 123 from the rear side of the leading tube. The curved recess is formed by a semicircular recess that matches the circumferential surface of the circular protrusion. The center of the circle of this semicircular recess is located at the center between the upper and lower sides on the front side of the left inner surface 6c and the right inner surface 6d of the leading tube 6.
In a state where the circular protrusion which is the support body side engaging portion 123 engages with the semicircular concave portion which is the tube side engaging portion 122 and the cylindrical support body 31 cannot move to the front side (hereinafter referred to as an initial state), A support rotation support portion 124 that forms the rotation center of the cylindrical support 31 is configured, and the cylindrical support 31 can rotate around the rotation center 120C of the support 120 formed by the support rotation support portion 124. It is configured as follows.
Thus, since the pipe side engaging portion 122 is formed by the semicircular recess and the support body side engaging portion 123 is formed by the circular protrusion, the circular protrusion is engaged with the semicircular recess and the support body 120 is engaged. This makes it easy to form the rotation center 120C and allows the support 120 to be smoothly rotated.
In the first embodiment, the circular protrusion that is the support-side engagement portion 123 engages with the semicircular recess that is the tube-side engagement portion 122 to form the support rotation support portion 124, and the support rotation support portion 124. The center of rotation 120C of the support 120 formed by the above is formed at an intermediate position between the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6. Therefore, the cylindrical support 31 is moved along the curved concave surfaces 111; When rocking in the front-rear direction, it is possible to equalize the surface pressure between the cylindrical water blocking member 171 and the curved concave surface 111; 111 on the curved convex surface 121; 121 of the support 120, and the support 120 is subjected to gravity load. Since it is possible to prevent the surface pressure between the lower surface of the cylindrical water blocking member 171 located at the lower part of the cylindrical water stop member 171 and the curved concave surface 111 from becoming excessive, the support 120 can be accurately moved in the front-rear direction, which is the desired direction, with a small force Rock Preparative will be able to, a rotary excavation element 46 so that it is possible to precisely swung by a small force in the vertical direction is the desired direction. Moreover, the frictional resistance between the tubular water stop member 171 and the curved concave surface 111; 111 can be reduced, and the tubular water stop member 171 can be prevented from being deteriorated at an early stage.

  The connecting strut portion 40 is formed by a T-shaped hollow strut in which one strut 42 and two branch struts 43 are combined. The two branch columns 43 extend in a direction away from each other on a straight line perpendicular to the extending direction of the columns 42 from the distal end portion of the column 42.

The rotating unit 41 includes a rotating mechanism unit 45 and a rotating excavator 46.
The rotation mechanism unit 45 is configured by a motor 47, for example. Motor mounts 44 are provided at both ends of the branch column 43, and a casing 48 of a motor 47 is fixed to each motor mount 44; 44. The rotating shafts 49; 49 of the two motors 47; 47 extend in directions away from each other on a straight line perpendicular to the extending direction of the support column (that is, on the center line of the branch support column 43) from the tip end of the support column 42.

  The rotary excavator 46 includes, for example, a circular box-shaped rotary body 50 having one end opening and the other end closed, which includes a cylindrical portion 50a and a bottom plate 50b that closes the other end of the cylindrical portion 50a, and an outer periphery of the cylindrical portion 50a of the rotary body 50. A plurality of excavation bits 52 provided on the surface 51 are provided.

  As shown in FIG. 2, the minimum bit-to-tip dimension 46S located on a line parallel to the first line 46A orthogonal to the rotation center line 46x of the rotary excavation body 46, the rotation center line 46x of the rotary excavation body 46 and the first The maximum bit-to-tip dimension 46L positioned on a line parallel to the second line 46B orthogonal to the line 46A is configured, and the maximum bit-to-tip dimension 46L is above and below the pipe 2 perpendicular to the rotation center line 46x of the rotary excavator 46. When the rotary excavator 46 is rotated in front of the top tube 6 because the minimum distance between the outer surfaces of the pipes is smaller than the shortest distance between the upper and lower inner surfaces of the pipe 2. In addition, it is possible to excavate the top and bottom of the natural ground in front of the top pipe 6, that is, to perform excavation with a vertical width larger than the top and bottom width of the top pipe 6, and to collect the rotary excavation body 46 at the starting base In times By setting the maximum width in the vertical direction of the excavated body 46 to be the minimum dimension 46S between the bit tip ends, the rotary excavated body 46 can be pulled back into the pipe 2, and the rotary excavated body 46 can be recovered to the starting base. Is possible.

As the motor 47, for example, a motor that operates by fluid pressure or a motor that operates by electricity is used. For example, when a hydraulic motor (hereinafter referred to as a hydraulic motor 47) is used, the hydraulic source 55 and the casing 48 of the hydraulic motor 47 are connected by a pressure hose 56 that forms a pressure oil supply path 56a and an oil return path 56b. That is, the pressure-resistant hose 56 is connected to the casing 48 of the hydraulic motor 47 through the T-shaped hollow path of the connecting support column 40. The hydraulic motor 47 is configured such that the rotating shaft 49 is rotated by pressure oil supplied into the casing 48 via the pressure hose 56. That is, the motor 47 and the hydraulic source 55 constitute a rotational drive source for the rotary excavator 46.
For example, the rotation rotated by the hydraulic motor 47 and the inner surface 53 of the bottom plate 50b of the rotating body 50 so that the circle center of the inner surface 53 of the bottom plate 50b of the rotating body 50 of the rotary excavator 46 and the rotation center of the rotating shaft 49 coincide. A connecting plate 54 provided at the tip of the shaft 49 is connected by a connecting tool 57 such as a screw. That is, the two rotary excavating bodies 46; 46 are positioned in front of the one end opening 6t of the leading pipe 6, and the two rotary excavating bodies 46; 46 are one rotation center line L common to the two rotary shafts 49; 49. Is configured to rotate around the center of rotation. Such a configuration including two rotary excavating bodies 46; 46 is called a twin header.

  As the swing drive means (drive means) of the rotary excavator 46, the left outer surface 30a and the right outer surface 30b of the support substrate 30 are swung back and forth with the rotation center line 30x of the support substrate 30 as the rotation center. Cylindrical support formed by the left and right swing drive means for swinging the rotary excavator 46 in the left-right direction (the direction orthogonal to the left inner surface 6c and the right inner surface 6d of the leading pipe 6) and the support rotation support portion 124. The upper and lower portions of the cylindrical support 31 are swung back and forth with the rotation center of the body 31 as the rotation center, and the rotary excavation body 46 is moved in the vertical direction (direction orthogonal to the upper inner surface 6a and the lower inner surface 6b of the top pipe 6). And a vertical swing driving means for swinging.

The left / right swing drive means includes a left / right swing jack 16 serving as a drive source for swinging the rotary excavator 46 to the left and right, a jack reaction force receiving member 18 connected to a propulsive force transmission component 64 described later, And a jack drive control device (not shown).
The left / right swinging jack 16 is constituted by, for example, a hydraulic jack.
Two left-right swinging jacks 16 are provided, one on each of the left end side and the right end side behind the support substrate 30.
The left and right swinging jack 16A has a base end of the cylinder 16b and a left and upper central side of the rear surface 30r of the support substrate 30 connected by a movable connecting means 22 such as a hinge, and a front end of the piston rod 16a. And the jack reaction force receiving member 18 are connected by a movable connecting means 23 such as a hinge.
The right and left rocking jack 16B has a base end of the cylinder 16b and a right upper and lower central side of the rear surface 30r of the support substrate 30 connected by a movable connecting means 22 such as a hinge, and a tip of the piston rod 16a. And the jack reaction force receiving member 18 are connected by a movable connecting means 23 such as a hinge.
Then, when the piston rod 16a of the left and right swinging jack 16A is extended and the piston rod 16a of the right and left swinging jack 16B is retracted, the left end portion of the support substrate 30 moves forward and is supported. Since the right end portion of the substrate 30 moves to the rear side, the rotary excavation body 46 swings to the right side.
Further, when the piston rod 16a of the right-hand side swinging jack 16B is extended and the piston rod 16a of the left-hand side swinging jack 16A is retracted, the right end portion of the support substrate 30 is moved forward and supported. Since the left end portion of the substrate 30 moves to the rear side, the rotary excavation body 46 swings to the left side.
The jack reaction force receiving member 18 is removed, and the tip of the piston rod 16a of the left / right swinging jack 16A and the tip of the piston rod 16a of the right / left swinging jack 16B are movable like a hinge. The connecting member 23 may be connected to a propulsive force transmission component 64 which will be described later. For example, the tip of the piston rod 16a of the left and right swinging jack 16A is connected to the rear left and right vertical extension column part 64c described later, and the tip of the piston rod 16a of the right and left swinging jack 16B is connected to the rear right and left upper and lower. You may connect with the extension pillar part 64d.

That is, the rotation center line L of the rotary excavator 46 is parallel to the upper inner surface 6a and the lower inner surface 6b, which are one pair of inner surfaces of the leading pipe 6 facing each other in parallel, and the propulsion direction F of the leading pipe 6 By providing a left-right swing drive means as a swing drive means that is set to intersect with an orthogonal plane in a state other than orthogonal, the rotary excavator 46 is moved in the left-right direction with the center line 6x of the top pipe 6 as a reference. Since the natural ground 99 can be excavated at a width interval wider than the left-right width interval of the leading tube 6 in front of the leading tube 6, when the leading tube 6 is propelled, one end opening of the leading tube 6 is opened. The possibility that 6t collides with the hard layer of the natural ground 99 is reduced, and the leading pipe 6 can be smoothly promoted. That is, prior to the advancement of the leading pipe 6, it becomes possible to excavate a cross-sectional area wider than the sectional area of the leading pipe 6 in front of the leading pipe 6, and it is possible to excavate in front of the leading pipe 6. Even when the natural ground is hard ground, the leading pipe 6 can be smoothly propelled in the underground 10.
Further, by swinging the rotary excavator 46 leftward or rightward with respect to the center line 6x of the leading pipe 6, the propulsion direction of the leading pipe 6 can be adjusted to the left and right.
Further, it is possible to cope with a case where only the right side in front of the front pipe 6 is to be excavated with priority and a case where only the left side in front of the front pipe 6 is to be excavated with priority.

The vertical swing drive means includes a vertical swing jack 80 that is a drive source for swinging the rotary excavator 46 up and down, a jack installation portion 81, and a jack drive control device (not shown).
The vertically swinging jack 80 is constituted by, for example, a hydraulic jack.
Four up-and-down swing jacks 80 are provided, and two each are arranged on the left end side and the right end side behind the support substrate 30.
That is, as shown in FIG. 3, the up / down swing jack 80 includes a left up / down swing jack 80A and a right up / down swing jack 80B, and the left up / down swing jack 80A includes an upper jack 80A1 (a first jack). ) And a lower jack 80A2 (second jack), and the right-hand vertical swinging jack 80B includes an upper jack 80B1 (first jack) and a lower jack 80B2 (second jack).
The jack installation portion 81 includes a left jack installation portion 81A fixed to a left center side connection portion 64g that forms a part of the propulsive force transmission component 64, and a right center side that forms a portion of the propulsion force transmission component 64. A right jack installing portion 81B fixed to the connecting portion 64j.
Then, as shown in FIG. 9A, on the upper surface of the left jack installation portion 81A, the center lines of the left upper jack 80A1 and the lower jack 80A2 are orthogonal to the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6. The base end of the cylinder 80a of the left upper jack 80A1 is installed in a fixed state, and the base end of the cylinder 80a of the left lower jack 80A2 is installed in a fixed state on the lower surface of the left jack installation portion 81A.
Further, the base of the cylinder 80a of the right upper jack 80B1 is placed on the upper surface of the right jack installation portion 81B so that the center lines of the right upper jack 80B1 and the lower jack 80B2 are orthogonal to the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6. The end is installed in a fixed state, and the base end of the cylinder 80a of the left lower jack 80B2 is installed in a fixed state on the lower surface of the right jack installation portion 81B.

  For example, as shown in FIG. 9B, the vertical swing jack 80 has a jack center line orthogonal to the upper inner surface 6 a and the lower inner surface 6 b of the leading pipe 6, and the curved convex surface of the cylindrical support 31. It is provided so as to coincide with the tangent line 121Y of the circular arc surface 121X forming 121. In other words, the center line of the jack is parallel to the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6 and perpendicular to the plane 129 including the rotation center line of the cylindrical support 31 formed by the support rotation support portion 124. At the same time, it is provided so as to coincide with the tangent 121Y of the arcuate surface 121X forming the curved convex surface 121 of the cylindrical support 31.

Then, from the initial state shown in FIG. 9 (b) in which the rotation center of the cylindrical support 31 is formed by the support rotation support portion 124, as shown in FIG. 9 (c), the left and right upper jacks 80A1; The reaction force R obtained when the piston rod 80b; 80b is extended and the piston head 80t; 80t of the piston rod 80b; 80b presses the upper inner surface 6a of the top pipe 6 is the jack installation portion 81, the propulsive force transmission component. By being transmitted to the cylindrical support 31 via 64, the cylindrical support 31 rotates about the support rotation support portion 124 as the rotation center, and the lower end side of the cylindrical support 31 moves to the front side and the cylinder The rotary excavator 46 is moved upward by moving the upper end side of the support 31 to the rear side.
Further, from the initial state shown in FIG. 9B in which the center of rotation of the cylindrical support 31 is formed by the support rotation support portion 124, as shown in FIG. 9D, the left and right lower jacks 80A2; The reaction force R obtained when the rod 80b; 80b is extended and the piston head 80t; 80t of the piston rod 80b; 80b presses the lower inner surface 6b of the top pipe 6 results in the jack installation portion 81 and the propulsive force transmission component 64. , The cylindrical support 31 rotates around the support rotation support portion 124 as the center of rotation, and the upper end side of the cylindrical support 31 moves to the front side while being cylindrical. When the lower end side of the support body 31 moves to the rear side, the rotary excavation body 46 moves downward.

  When the cylindrical support 31 rotates about the support rotation support portion 124, the center line of the vertical swing jack 80 is inclined from the state perpendicular to the upper inner surface 6a and the lower inner surface 6b of the top tube 6. The piston head 80t of the vertically swinging jack 80 is formed in an arc surface so as to be in point contact with the inner surface of the top tube 6 as shown in FIG. 4; FIG. 5: FIG. Is preferably connected to the tip of the piston rod by a movable connecting means such as a hinge.

By providing the vertical swing drive means, the rotary excavation body 46 can be swung in the vertical direction with the center line 6x of the leading pipe 6 as a reference, and the vertical width interval of the leading pipe 6 is in front of the leading pipe 6. Since the natural ground 99 can be excavated at wider vertical intervals, the top pipe 6 can be smoothly promoted. That is, prior to the advancement of the leading pipe 6, it becomes possible to excavate a cross-sectional area wider than the sectional area of the leading pipe 6 in front of the leading pipe 6, and it is possible to excavate in front of the leading pipe 6. Even when the natural ground is hard ground, the leading pipe 6 can be smoothly propelled in the underground 10.
In addition, the propulsion direction of the leading pipe 6 can be adjusted up and down by swinging the rotary excavator 46 upward or downward with the center line 6x of the leading pipe 6 as a reference.
Further, it is possible to cope with a case where it is desired to excavate only the upper side in front of the front pipe 6 and a case where it is desired to excavate only a lower side in front of the front pipe 6.

  As described above, the cylindrical support 31 is rotated about the rotation center of the support rotation support portion 124 in response to the force from the drive source, and the curved convex surface 121; 121 formed on the cylindrical support 31 is used. Moves in a direction along the curved concave surface 111; 111 formed on the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6, so that the rotary excavator 46 is orthogonal to the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6. The rotary excavator 46 is configured to be able to swing in the vertical direction about the center line 6x of the leading pipe 6.

In the installation work of the pipe 2 in the ground 10, the work is performed while monitoring whether or not the leading pipe 6 is moving in the designed direction by a measuring means (not shown).
According to the pipe installation device 1 of the first embodiment, when it is detected that the traveling direction of the leading pipe 6 is deviated from the planned position, the position of the rotary excavator 46 is moved in the vertical direction and the horizontal direction. Alternatively, by continuing the operation while moving the position of the rotary excavator 46 in the vertical direction and the horizontal direction, it is possible to correct the deviation in the traveling direction of the leading pipe 6.

  The water stop device 150 includes a cylindrical support body peripheral side water stop device 160 and a cylindrical support outer periphery side water stop device 170.

The cylindrical support body peripheral side water stop device 160 has, for example, an end opening edge 162 side of a cylinder of a bellows cylindrical water stop member 161 as a cylindrical water stop member formed in a bellows shape by a stretchable material such as rubber. The bellows cylinder is fixed to the front opening edge 163 of the cylindrical support 31 and the other end opening edge 164 side of the cylinder of the bellows cylindrical water blocking member 161 is fixed to the outer peripheral edge 165 side of the front surface 30f of the support substrate 30. The water-stop member 161 is configured to prevent water from moving rearward of the cylindrical support 31 through the space between the inner peripheral surface of the cylindrical support 31 and the outer peripheral surface of the support substrate 30.
That is, the cylindrical support body peripheral side water stop device 160 moves the rotary excavator 46 up and down when the left and right sides of the support substrate 30 swing back and forth when the rotary excavator 46 is swung left and right. When the upper and lower sides of the support substrate 30 are swung in the front-rear direction when the support substrate 30 is swung in the direction, the portion of the bellows cylindrical water-stopping member 161 connected to the portion moved to the rear of the support substrate 30 is extended. The site | part of the bellows cylindrical water-stop member 161 connected with the part which moved ahead 30 is shrunk.

By providing the cylindrical support body peripheral side water stop device 160, mud contained in the excavation sludge taken into the front surface 30 f side of the support substrate 30 regardless of the state of the support substrate 30. It can prevent moving to the back of the support substrate 30 via between the surface and the inner peripheral surface of the cylindrical support 31. That is, the pipe installation device 1 having a structure capable of maintaining the water stop inside the cylindrical support 31 can be provided.
Further, since the other end opening edge 164 side of the cylinder of the bellows tubular water blocking member 161 is fixed to the outer peripheral edge 165 side of the front surface 30f of the support substrate 30, a large amount of excavation gap can be taken into the front surface 30f side of the support substrate 30. Therefore, the efficiency of drainage can be improved.
In addition, by using the bellows cylindrical water stop member 161 having excellent shape retention performance when stretched, a bellows cylindrical water stop between the outer peripheral surface of the support substrate 30 and the inner peripheral surface of the cylindrical support 31 is provided. It is possible to prevent the member 161 from being bitten and improve the reliability of the water stop device.

  The cylindrical support outer peripheral side water stop device 170 includes an outer peripheral surface 172 and a leading end of the cylindrical water stop member 171 due to elastic deformation of the cylindrical water stop member 171 attached to the outer peripheral surface of the cylinder on the front side of the cylindrical support 31. The compact surface contact with the curved concave surface 111 of the pipe 6 maintains the watertight performance between the outer peripheral surface 172 of the cylindrical water-stopping member 171 and the curved concave surface 111 of the leading pipe 6, and the front side of the cylindrical support 31. Left and right front portions 175; 176 of the cylindrical water-stopping member 171 by elastic deformation of the cylindrical water-stopping member 171 attached to the outer peripheral surface of the cylinder of FIG. The water-tight performance between the tubular water-stopping member 171 and the water-stopping member pressing portion 173 is maintained by the pressure-contact surface contact with the water-stopping member pressing portion 173; 173 provided so as to protrude in the longitudinal direction. Configured to do.

That is, an annular mounting groove for mounting an annular water stop member as in Patent Document 1 is not formed on the outer peripheral surface of the cylinder on the front side of the cylindrical support 31, and the front side of the cylindrical support 31 is not formed. A cylindrical water-stop member 171 is attached to the outer peripheral surface so that the inner peripheral surface is in close contact with the smooth outer peripheral surface having no irregularities, which is the outer peripheral surface of the cylinder, and surrounds the outer peripheral surface.
The cylindrical water-stop member 171 is formed of a cylindrical body such as a belly band with a relatively long cylinder. The tube length and the tube thickness of the tubular water blocking member 171 are such that when the upper and lower portions of the tubular support 31 move back and forth from the initial state of the tubular support 31, the curved concave surface of the leading tube 6. 111 and the length and thickness which can be contacted in the state which maintained the watertight performance mentioned above.
Further, the tubular water blocking member 171 is placed on the outer peripheral surface of the cylindrical support 31 so as to extend from the front end of the outer peripheral surface of the cylindrical support 31 toward the rear end of the outer peripheral surface. By being attached in close contact, the left and right front end surfaces of the tubular water stop member 171 are configured to first contact the water stop member pressing portion 173; 173.
The cylindrical water stop member 171 is formed such that, for example, the inner diameter and outer diameter of the front end opening are smaller than the inner diameter and outer diameter of the rear end opening, and the shape of the outer peripheral surface and inner peripheral surface. However, a rubber cylinder formed in a shape corresponding to the outer peripheral surface on the front side of the cylinder forming the cylindrical support body, or a cylindrical rubber cylinder is fitted on the outer peripheral surface on the front side of the cylinder forming the cylindrical support body. By being inserted, it is attached to the outer peripheral surface on the front side of the cylinder forming the cylindrical support.

The water-stopping member pressing portions 173; 173 are formed of a long plate material having a square cross section, and are formed on the upper inner surface 6a and the lower inner surface 6b between the upper and lower surfaces 125; 125 extending to the front side of the curved concave surface 111; 111. Arranged so as to continuously extend in the orthogonal direction and fixed to the left inner surface 6c and the right inner surface 6d of the leading tube 6, so as to protrude from the left inner surface 6c and the right inner surface 6d of the leading tube 6. It has been.
And the cylindrical water-stop member 171 is fixed to the outer peripheral surface of the cylinder of the front side of the cylindrical support body 31 so that the front-end part of a cylinder may be located slightly ahead of the front end surface of the cylindrical support body 31. In the initial state, the surface contact pressure between the left and right front portions 175; 176 and the water stop member pressing portion 173; 173 of the cylindrical water stop member 171 can be increased, and the cylindrical support 31 can be moved from the initial state. Even when the upper end portion and the lower end portion swing in the front-rear direction, a watertight state can be formed by surface contact between the left and right front portions 175; 176 and the water stop member pressing portion 173; 173 of the cylindrical water stop member 171. It becomes like this.

  That is, the cylindrical support outer peripheral water stop device 170 is a cylindrical water stop member 171 provided on the front outer peripheral surface including the curved convex surface 121; 121 of the cylindrical support 31 facing the inner peripheral surface of the front pipe 6. And provided on the upper inner surface 6a and the lower inner surface 6b of the top pipe 6 so that the water tightness between the outer peripheral surface 172 and the outer peripheral surface 172 can be maintained in surface contact with the outer peripheral surface 172 of the cylindrical water stop member 171 in the vertical direction. Watertight performance between the curved concave surface 111; 111 and the left and right front portions 175; 176 of the tubular water-stopping member 171 in the front-rear direction and the left and right front portions 175; 176 of the tubular water-stopping member 171. It is configured to include a water stop member pressing portion 173; 173 provided on the left inner surface 6c and the right inner surface 6d of the leading pipe 6 so as to be maintained.

9 (a); As shown in FIG. 10 (a), a cylindrical support 31 having a cylindrical water-stopping member 171 fixed to the outer peripheral surface on the front side of the cylinder is connected to the top through the other end opening of the top pipe 6. As shown in FIG. 9B; FIG. 10B, the circular protrusions that are the support-side engaging portions 123 are inserted into the semicircular circumference that is the tube-side engaging portions 122, as shown in FIG. The support rotation support portion 124 is configured by engaging with the recess, and the outer peripheral surface 172 of the tubular water blocking member 171 and the curved concave surfaces 111; 111 provided on the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6 are provided. The cylindrical water-stopping member 171 and the water-stopping member are brought into surface contact with each other in a watertight state in the vertical direction and the left and right front portions 175; 176 of the cylindrical water-stopping member 171 are pressed against the water-stopping member pressing portions 173; In a state where the pressing portions 173 and 173 are in contact with each other in a watertight state in the front-rear direction, that is, in an initial state. A constant.
In the initial state, the propulsive force generated by the hydraulic jack 61A is transmitted to the cylindrical support 31 via the propulsive force transmitting means 62, so that the propulsive force transmitted to the cylindrical support 31 is cylindrical. Via a stopper that restricts the forward movement of the support 31, in other words, a curved concave surface 111; 111 that functions as a propulsive force receiving part, a water stop member pressing part 173; 173, and a pipe side engaging part 122; 122. The pipe installation device 1 can be propelled to the underground 10 by being transmitted to the leading pipe 6 and excavating the underground 10 by rotating the rotary excavator 46.
Then, after connecting the succeeding pipe to the rear end surface 102e of the leading pipe 6 remaining in the starting base 100 after the propulsion work of the leading pipe 6, the leading pipe 6 and the following pipe can be propelled to the ground 10 together. That is, after the succeeding pipe is sequentially connected to the rear end of the rearmost succeeding pipe remaining in the departure base 100 after the propulsion work, the propulsion operation is performed, so that a plurality of succeeding pipes connected to the rear of the leading pipe 6 and the leading pipe 6 are performed. A pipe composed of a pipe is installed in the underground 10. In other words, the pipes constituting the support work or the like can be installed in the underground 10.

  For example, in the case where the position of the rotary excavator 46 is moved in the vertical direction, as shown in FIG. 9 (c): FIG. 9 (d); FIG. 10 (c): FIG. When the cylindrical support 31 is rotated by, for example, α ° with the rotation center of the support rotation support portion 124 as the rotation center by driving 80, the curved convex surface 121 of the cylindrical support 31 is in a direction along the curved concave surface 111. However, in this case, a water-stop portion that maintains the watertightness between the curved convex surface 121 and the curved concave surface 111 is formed by surface contact between the outer peripheral surface 172 of the cylindrical water-stop member 171 and the curved concave surface 111; 111. 8 (b): As shown in FIG. 8 (c), the left and right front portions 175; 176 of the cylindrical water-stopping member 171 are pressed against the water-stopping member pressing portions 173; Water stop member 171 and water stop member pressing Since the water stop part which maintains the watertightness between the parts 173 and 173 is formed, the groundwater of the natural ground 99 passes between the curved convex surface 121 of the cylindrical support 31 and the curved concave surface 111 of the top pipe 6. Or the ground water in the natural ground 99 is between the left outer surface of the cylindrical support 31 and the left inner surface 6c of the top pipe 6 and between the right outer surface and the top pipe of the cylindrical support 31. 6 to the rear of the cylindrical support 31 via the right inner surface 6d.

  Of the pair of inner surfaces and the other pair of inner surfaces of the leading pipe 6 that face each other in parallel, the inner surface that becomes the lower surface when the pipe is installed, for example, the lower inner surface 6b of the leading pipe 6 as shown in FIG. As a protrusion as a friction reducing device for reducing friction between the lower inner surface 6b of the leading pipe 6 and the curved convex surface 121 of the cylindrical support 31, for example, on the curved convex surface 121 that forms the lower outer surface of the cylindrical support 31. One or a plurality of wheels 190 (for example, casters configured so that the traveling direction of the wheels can be freely set) are provided. The wheels 190 are preferably provided one by one on the left and right sides of the curved convex surface 121, for example.

  By providing the wheel 190 as a protrusion for reducing friction between the lower inner surface 6b of the leading pipe 6 and the curved convex surface 121 of the cylindrical support 31, the lower inner surface serving as the lower surface of the leading pipe and the lower outer surface of the supporting body Therefore, when the cylindrical support 31 and the rotary excavation body 46 are recovered to the starting base after the pipe installation work is completed, the lower inner surface 6b of the top pipe 6 and the curved convex surface 121 of the cylindrical support 31 Friction can be reduced, and the collection work of the cylindrical support 31 and the rotary excavation body 46 after the pipe installation work can be easily performed.

The propulsion device 70 includes a propulsion drive source 61, a support 120, propulsion force transmission means 62 that transmits the propulsion force generated by the propulsion drive source 61 to the support 120, and the propulsive force transmitted to the cylindrical support 31 at the top. And a propulsive force receiving portion for transmitting to the tube 6.
In other words, the propulsive force generated by the propulsion drive source 61 is transmitted to the support body 120 via the propulsive force transmission means 62 and the rotary excavation body 46 is rotated to be coupled to the support body 120 via the coupling strut portion 40. The rotary excavator 46 propels forward, and the propulsive force transmitted to the support 120 is transmitted to the leading pipe 6 via the propelling force receiving portion, and the leading pipe 6 propels forward.

  The propulsive force receiving portion includes curved concave surfaces 111; 111, a water stop member pressing portion 173; 173, and a pipe side engaging portion 122; 122.

The propulsive force transmission means 62 includes a propulsive force transmission component 64, a propulsive force transmission rod 71, and a propulsion force transmitting member 72.
The propulsive force transmission component 64 is formed by combining, for example, H-section steel. For example, it is connected to the left end rear end surface of the cylinder of the cylindrical support 31 and is connected to the front left upper and lower extension column 64a provided so as to extend vertically and to the right end rear end surface of the cylinder of the cylindrical support 31. A front right upper and lower extension post 64b provided to extend to the left, a rear left upper extension post 64c connected to the left end of the jack reaction force receiving member 18 and provided to extend up and down, and a jack reaction force receiving A rear right vertical extension column 64d that is connected to the right end of the member 18 and extends vertically, and a front end and a front left vertical extension column 64a that extend in the front-rear direction are connected to a rear end and a rear left side. The upper left connecting part 64e, the lower left connecting part 64f, the left central connecting part 64g connected to the upper and lower extension pillar part 64c, and the front end and the front right upper and lower extension post part 64b extending in the front-rear direction are connected. End and rear right upper / lower extension post 64d are connected Comprises a right upper side connecting portion 64h, the lower right side connecting portion 64i, a right central connecting portion 64j.

The propulsive force transmission rod 71 has a length from one end to the other end longer than the shortest distance between the rear end surface of the propulsion force transmission component 64 and the rear end surface 102e of the leading pipe 6. It is. As the propulsive force transmission rod-shaped body 71, for example, H-shaped steel is used.
The propulsive force transmission rod-like body 71 is installed such that the center line faces the same direction as the center line of the leading pipe 6. The front end surface of the left propulsive force transmitting rod-like body 71A and the upper and lower center positions on the rear surface of the rear left upper / lower extension column portion 64c are connected, and the front end surface of the right propulsive force transmission rod-like body 71B and the rear right upper / lower extension column portion 64d. The upper and lower center positions on the rear surface are connected.

  The propulsion drive source 61 is constituted by, for example, a hydraulic jack 61A. A pressing plate 61b is provided at the tip of the piston rod 61a of the hydraulic jack 61A. The cylinder 61c of the hydraulic jack 61A is fixed to a jack reaction force receiving member (not shown).

And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B projecting rearward from the rear end face 102e of the leading pipe 6, and the left and right propelling force transmitting rod-like bodies 71A; 71B Are connected to the other end by a bolt or a vise device not shown in the figure, and the central portion between the other ends of the left and right propulsive force transmitting rods 71A; 71B in the abutting member 72 is pressed by the pressing plate 61b of the hydraulic jack 61A. Thus, the pressing force by the hydraulic jack 61A is transmitted to the leading pipe 6 and the rotary excavator 46; 46 through the propulsive force transmission rod 71, the propulsive force transmission component 64, the cylindrical support 31, and the propulsive force receiver. Therefore, the leading pipe 6 propels forward and the rotary excavator 46; 46 propels forward.
That is, the propulsive force by the hydraulic jack 61A is applied to the contact member 72, the left and right propulsive force transmission rods 71A; 71B, the propulsive force transmission component 64, the cylindrical support 31, the circular hole 38, the protrusion 37, the support substrate 30, and the connection. While being transmitted to the rotary excavation body 46 through the support column 40, the propulsive force by the hydraulic jack 61A is applied to the abutting member 72, left and right propulsive force transmitting rods 71A; 71B, the propulsive force transmitting component 64, and the cylindrical support. 31, the pipe-side engaging portion 122; 122, the curved concave surface 111; 111, the water stop member pressing portion 173; 173, and transmitted to the top pipe 6, and the rotary excavating body 46 rotates to rotate the rotary excavating body 46. And the top pipe 6 becomes the pipe installation apparatus 1 which pushes the underground 10 together.
In other words, the tube-side engaging portion 122; 122, the curved concave surface 111; 111, and the water stop member pressing portion 173; 173 receive the tubular support 31 and restrict the forward movement of the tubular support 31. It functions as a stopper, in other words, a propulsion receiving part.
In this case, the right propulsive force transmitting rod-like body 71B connected to the upper and lower central positions on the rear surface of the rear right upper and lower extension post 64d and the left side connected to the upper and lower central positions on the rear surface of the rear left upper and lower extension post 64c. The propulsive force transmitted to the propulsive force transmitting component 64 via the propulsive force transmitting rod 71A is transmitted to the four corners of the rear end surface of the cylindrical support 31 (see FIGS. 4 and 5). Further, the propulsive force can be evenly transmitted to the cylindrical support 31, the posture of the cylindrical support 31 can be stably maintained, and the swinging operation can be stabilized.

The water supply device 75 includes a water storage tank 75a, a pump 75b for water supply, a water supply pipe 75c, and a water supply pipe holding through hole 15 that holds a front end opening of the water supply pipe 75c.
The water supply pipe 75c includes a front part 75x that is held in the water supply pipe holding through-hole 15 and a main part 75y that is connected to the rear end of the front part 75x and extends outward from the rear end opening of the leading pipe 6. . For example, the front portion 75x is formed of a steel pipe, and the main portion 75y is formed of a hard vinyl bellows tube. The front end opening side of the front portion 75x is fixed to the water supply pipe holding through hole 15 of the support substrate 30 so that water can be discharged to the natural ground 99 in front of the front surface 30f of the support substrate 30, and the rear portion 75x The end opening side is provided so as to protrude rearward from the rear surface 30 r of the support substrate 30. The rear end opening of the front portion 75x and the front end opening of the main portion 75y are connected so as to communicate with each other, and the rear end opening of the main portion 75y and the discharge port of the water supply pump 75b are connected so as to communicate with each other. And the suction port of the pump 75b for water supply and the water storage tank 75a are connected so that communication is possible by the connecting pipe outside a figure. Two systems of water supply devices 75 are provided on the left and right sides inside the upper portion of the top pipe 6. The front portion 75x has a front end opening located on the inner surface side of the head tube 6 so that the water supply tube 75c does not contact the left and right inner surfaces of the head tube 6 when the support substrate 30 swings. The end opening is provided so as to be located on the center side of the leading pipe 6. In other words, the front portion 75x is provided such that the center line of the tube extends so as to incline from the left and right inner surfaces 6c; 6d side of the leading tube 6 toward the center of the leading tube 6.

The mud drain device 76 includes a mud tank 76a, a pump 76b for mud, a mud pipe 76c, and a mud pipe holding through hole 14 that holds the front end opening of the mud pipe 76c.
The drainage pipe 76c includes a front part 76x held in the drainage pipe holding through hole 14 and a main part 76y connected to the rear end of the front part 76x and extending outward from the rear end opening of the leading pipe 6. . For example, the front portion 76x is formed of a steel pipe, and the main portion 76y is formed of a hard vinyl bellows tube. The front end opening side of the front side portion 76x is fixed to the drainage pipe holding through hole 14 of the support substrate 30 so that the excavated soil gathered ahead of the front surface 30f of the support substrate 30 can be taken in through the front end opening. The rear end opening side of 76x is provided so as to protrude rearward from the rear surface 30r of the support substrate 30. The rear end opening of the front portion 76x and the front end opening of the main portion 76y are connected so as to communicate with each other, and the rear end opening of the main portion 76y and the suction port of the mud pump 76b are connected so as to communicate with each other. And the discharge port of the pump 76b for mud and the mud tank 76a are connected so that communication is possible by a connecting pipe outside the figure. Two systems of the mud discharge device 76 are provided on the left and right sides inside the lower portion of the top pipe 6. It should be noted that the front portion 76x has a front end opening located on the inner surface side of the front tube 6 so that the sludge tube 76c does not contact the left and right inner surfaces of the front tube 6 when the support substrate 30 swings. The end opening is provided so as to be located on the center side of the leading pipe 6. In other words, the front portion 76x is provided such that the center line of the tube extends so as to incline from the left and right inner surfaces 6c; 6d of the leading tube 6 toward the center of the leading tube 6.

In addition, the water storage tank 75a and the waste mud tank 76a are comprised by the collection tank 75X which the water storage tank 75a and the waste mud tank 76a integrated, for example. That is, the partition 75w is provided inside the collective tank 75X to divide the collective tank 75X into two regions, one region is used as the water storage tank 75a, and the other region is used as the mud tank 76a.
That is, when a certain amount of water is first filled in the collecting tank 75X, and the water pump 75b is driven to pump water in front of the support substrate 30, it rotates with the water pumped forward of the support substrate 30. The earth and sand excavated by the excavated body 46; 46 are mixed to become muddy water. Then, the mud water in front of the support substrate 30 is discharged to the mud tank 76a by driving the mud pump 76b. The mud in the mud discharged to the mud tank 76a settles on the bottom of the mud tank 76a, and the mud that has entered the water storage tank 75a beyond the partition 75w is again supplied to the support substrate 30 by the pump 75b for water supply. Pumped forward. That is, since the muddy water can be circulated and supplied to the front of the support substrate 30, the amount of water used can be reduced. Further, since muddy water having a specific gravity greater than that of water can be supplied to the front of the support substrate 30, it can resist the pressure of the ground and groundwater, and it is easy to equalize the pressure of the ground and groundwater and the pressure supplied to the front of the support substrate 30. Therefore, the influence on the underground 10 such as ground subsidence can be reduced. Moreover, since the front of the support substrate 30 becomes muddy water, the mud can be drained smoothly and excavation is facilitated.
Alternatively, muddy water may be filled in the collecting tank 75X from the beginning, and the muddy water may be circulated between the front of the support substrate 30 and the collecting tank 75X by driving the water supply pump 75b.

Next, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated.
Rotating the assembly in which the excavating machine 26, the propulsion force transmission component 64, the swing drive means, the propulsion device 70 excluding the abutting material 72, the water supply pipe 75c, and the sludge pipe 76c are assembled. From the excavation body 46 side, it enters into the top pipe 6 through the rear end opening of the top pipe 6, and the cylindrical support body 31 is set to an initial state. And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmission rod-like bodies 71A; 71A; It connects with the other end of 71B with a volt | bolt outside a figure, a vise, etc. Then, the water supply pump 75b is driven to supply muddy water to the front of the support substrate 30, and the muddy water is circulated between the front of the support substrate 30 and the inside of the collecting tank 75X. While supplying the pressure oil from the source 55 to the hydraulic motor 47 and rotating the rotary excavator 46, the propulsive force is applied to the abutting material 72 by operating the propulsion drive source 61, so that the propulsive force is transmitted to the propulsive force transmitting rod-shaped body. 71, the propulsive force transmitting component 64, the cylindrical support 31, and the propulsive force receiving portion are transmitted to the leading pipe 6 and the rotary excavator 46; 46, and the leading pipe 6 propels forward and the rotary excavator 46; 46 propels forward.
After the front pipe 6 is installed in the ground 10 leaving the rear end face 102e of the front pipe 6, a subsequent pipe (not shown) is connected to the rear end face 102e of the front pipe 6 by welding or a fastener such as a bolt, Furthermore, the other end of the leading thrust transmission rod 71 and one end of the trailing thrust transmission rod 71 are joined by bolts or welding, so that the trailing thrust transmission rod 71 is connected to the rear of the trailing thrust transmission rod 71. The propulsion force transmitting rod 71 is added, an extension pressure hose (not shown) is added to the other end of the pressure hose 56, and an extension water supply pipe (not shown) is added to the other end of the water supply pipe 75c. An extended drainage pipe (not shown) is added to the other end of 76c. Then, the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B protruding rearward from the rear end edge of the succeeding pipe, and the abutting material 72 is disposed on the piston rod of the hydraulic jack 61A. By rotating the rotary excavator 46; 46 while pressing with 61a, the leading pipe 6 is propelled while the rotary excavator 46 excavates, and the subsequent pipe is installed in the ground.
Thereafter, similarly, for example, a supporting work can be constructed by sequentially connecting the subsequent succeeding pipe to the rear end edge of the previous succeeding pipe and installing it in the ground 10.

After the pipe installation work is completed, the excavating machine 26 and the like are pulled back into the start base 100 that is the starting point of excavation and collected. According to the first embodiment, since the propulsive force transmission rod-shaped body 71 is added, when the excavating machine 26 and the like are collected, the propulsive force transmission rod-shaped body 71 1 is selected from the rearmost propulsive force transmission rod-shaped body 71 side. The excavating machine 26 and the like can be easily recovered by pulling back into the starting base 100 by the length and removing the propulsive force transmission rod 71 in order from the rearmost side to the front. In particular, the curved convex surface 121 that forms the lower outer surface of the cylindrical support 31 facing the lower inner surface 6b of the leading pipe 6 reduces the friction between the lower inner surface 6b of the leading pipe 6 and the curved convex surface 121 of the cylindrical support 31. For example, since a wheel (for example, a caster configured so that the traveling direction of the wheel can be freely set) 190 is provided as a projection as a friction reducing device, the recovery operation of the excavating machine 26 and the like is facilitated. In this case, the hydraulic jack 61A, which is an example of a propulsion device, need only be installed in the start base 100 that is the starting point for excavation, so that the device cost can be reduced.
It should be noted that the excavating machine 26 and the like may be pushed into the starting base 100 on the arrival side and recovered. For example, the head pipe 6 is pushed out to the starting base 100 on the arrival side to remove the propulsion force receiving portion, and then the excavating machine 26 is pushed into the starting base 100 on the reaching side and collected. In this case, the work of pushing the excavating machine 26 and the like into the starting base 100 on the arrival side is easier than the work of pulling the excavating machine 26 and the like back into the starting base 100 that is the starting point of excavation. Collection work becomes easy.

  According to the pipe installation device 1 of the first embodiment, the one end opening 6t and the leading pipe of the leading pipe 6 are formed from the upper inner face 6a and the lower inner face 6b, which are one pair of inner faces facing each other on the one end opening 6t side of the leading pipe 6. A pair of curved concave surfaces 111; 111 provided so as to approach the center line 6x of 6; a support 120 that rotatably supports the rotary excavator 46; and the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6 pipe. The curved convex surface 121; 121 formed on the support body 120 and guided by the curved concave surface 111; 111, and the curved convex surface 121; 121 formed on the support body 120 in the direction along the curved concave surface 111; 111. Since the rotary excavator 46 is configured to be swingable in a direction perpendicular to the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6, the rotary excavator 46 is formed on the support 120. Since the dimension between the curved convex surfaces 121; 121 can be made a large dimension close to the vertical dimension in the pipe between the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6, the upper and lower ends of the support 120 are curved concave surfaces 111 with a small force. The rotary excavator 46 can be swung in the vertical direction perpendicular to the left inner surface 6c and the right inner surface 6d, which is the other pair of inner surfaces of the top pipe 6 facing each other in parallel. Can be moved.

According to the pipe installation device 1 of the first embodiment, the pipe side engaging portions 122; 122 provided on the left inner surface 6c and the right inner surface 6d of the leading pipe 6 are opposed to the left inner surface 6c and the right inner surface 6d of the leading pipe 6. The support body side engaging portions 123; 123 provided on the left outer surface and the right outer surface, which are the other pair of outer surfaces of the supporting body 120 that face each other, the tube side engaging portion 122 and the support body side engaging portion 123 are engaged with each other. And a support rotation support portion 124; 124 that forms a rotation center 120C of the support 120 that is orthogonal to the left inner surface 6c and the right inner surface 6d of the leading pipe 6, and a pair of support members 120 facing each other. The rotating excavator 46 can swing in a direction perpendicular to the upper inner surface 6a and the lower inner surface 6b of the top pipe 6 by rotating the support body 120 so that the curved convex surface 121; Become Since the support rotating support portion 124; 124 is provided, the surface pressure between the cylindrical water-stop member 171 and the curved concave surface 111; 111 on the curved convex surface 121; It is possible to suppress the surface pressure between the lower surface of the tubular water blocking member 171 located at the lower part of the support body 120 and the curved concave surface 111 due to the gravity load. It becomes possible to swing accurately in the front-rear direction, which is a desired direction, by force, and it is possible to swing the rotary excavator 46 accurately in a vertical direction, which is a desired direction, with a small force.
Moreover, it can suppress that the cylindrical water stop member 171 deteriorates early by the increase in frictional resistance.

  According to the pipe installation device 1 of the first embodiment, the support device includes the support rotation support portion 124; 124 that forms the rotation center 120C of the support 120, the curved concave surface 111; 111, and the curved concave surface 111. And the curved convex surface 121 guided by 111, the support body 120 can be more accurately swung in the front-rear direction, which is a desired direction, with a smaller force. It is possible to provide the tube installation device 1 that can be accurately swung in the vertical direction, which is the desired direction, with a smaller force.

According to the pipe installation device 1 of the first embodiment, the leading pipe 6 is connected to the support body 120 as a drive source of the drive means for transmitting the force for swinging the rotary excavation body 46 in the vertical direction to the support body 120. The upper jacks 80A1 and 80B1 that transmit the reaction force when the upper inner surface 6a is pressed to the support 120 as a force and the reaction force when the lower inner surface 6b connected to the support 120 is pressed are force The lower jacks 80A2 and 80B2 are transmitted to the support 120 as the center lines of the upper jacks 80A1 and 80B1 and the lower jacks 80A2 and 80B2 are orthogonal to the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6 and are curved convex surfaces. 121; 121 is provided so as to coincide with the tangent line 121Y of the circular arc surface 121X forming 121, and supports the force to rotate the support 120 around the rotation center 120C. Will be able to impart to the 120, the support 120 will be able to swing the rotary drilling body 46 in the vertical direction and rotated about the rotation center 120C.
The upper jacks 80A1; 80B1 and the lower jacks 80A2; 80B2 may not be provided so that the center line coincides with the tangent line 121Y of the circular arc surface 121X forming the curved convex surface 121; 121.
That is, the center lines of the upper jacks 80A1; 80B1 and the lower jacks 80A2; 80B2 may be set closer to the rotation center 120C than the position of the tangent 121Y of the circular arc surface 121X that forms the curved convex surface 121; 121. In this case, the support 120 can be rotated by the same rotation amount with a short jack stroke amount, compared to a jack that is provided so that the center line coincides with the tangent line 121Y. Can be used.
Further, the center lines of the upper jacks 80A1; 80B1 and the lower jacks 80A2; 80B2 may be set at positions farther from the rotation center 120C than the position of the tangent 121Y. In this case, the support body 120 can be rotated by the same rotation amount with a long jack stroke amount as compared with a jack that is provided so that the center line coincides with the tangent line 121Y. For example, when a jack provided so that the center line coincides with the tangent line 121Y is used, if the jack stroke amount required to rotate the support 120 by a desired amount of rotation is too small, the jack piston It becomes difficult to control the expansion and contraction. In such a case, the position of the tangent 121Y from the rotation center 120C can be increased so that the jack stroke amount required to rotate the support 120 by a desired rotation amount can be increased and the expansion and contraction control of the jack can be easily performed. You may attach and use a jack so that the center line of a jack may be located in a position farther away.

According to the pipe installation device 1 of the first embodiment, the support body 120 is installed on the front side in the top pipe 6 so that the center line of the cylinder extends along the center line 6x of the top pipe 6. The outer surface opposite to the upper inner surface 6a and the lower inner surface 6b of the tube 6 supports the cylindrical support 31 formed on the curved convex surface 121; 121 and the rotary excavation body 46, and can swing inside the cylindrical support 31. The rotary excavator 46 is connected to the support substrate 30 via a connecting support column 40 provided so as to protrude forward from the front surface 30f of the support substrate 30. The support substrate 30 has a circular hole 38 in the cylindrical support 31 so that a pair of outer surfaces 30a; 30b facing the left inner surface 6c and the right inner surface 6d of the leading pipe 6 can swing in the front-rear direction of the cylindrical support 31. Installed in the projection 37 inside and rotated Kezukarada 46 is configured to be swung in the lateral direction perpendicular to the left inner surface 6c and the right inner surface 6d of the head pipe 6.
That is, the cylindrical support 31 for swinging the rotary excavator 46 in the vertical direction and the support substrate 30 for swinging the rotary excavator 46 in the left-right direction are separately provided. As described above, the tube installation apparatus can perform each swinging operation accurately and easily compared to the configuration in which the swing excavator is swung in the vertical direction and the swinging in the left-right direction with one spherical substrate. 1 can be provided.

According to the tube installation device 1 of the first embodiment, the one end opening edge 162 of the cylinder is fixed to the front opening edge 163 of the cylindrical support 31, and the other end opening edge 164 of the cylinder is formed on the front surface 30f of the support substrate 30. Water provided to the rear of the cylindrical support 31 is provided between the inner peripheral surface of the cylindrical support 31 and the outer peripheral surface of the support substrate 30 provided with a bellows cylindrical water-stopping member 161 fixed to the outer peripheral edge 165 side. Therefore, the support substrate 30 is configured to maintain a watertight state by providing a water stop member between the outer peripheral surface of the support substrate 30 and the inner peripheral surface of the cylindrical support 31. Since the structure that causes friction between the water stop member and the outer peripheral surface of the support substrate 30 or the inner peripheral surface of the cylindrical support 31 is not adopted every time the oscillates, the left and right sides of the support substrate 30 are moved in the front-rear direction. The load when swinging can be reduced.
That is, the water stopping performance between the outer peripheral surface of the support substrate 30 and the inner peripheral surface of the cylindrical support 31 can be maintained, and the load when the left and right sides of the support substrate 30 are swung back and forth can be reduced. A possible pipe installation device 1 can be provided.

According to the pipe installation device 1 of the first embodiment, the water stop device includes a front end of the outer peripheral surface on the front outer peripheral surface including the curved convex surface 121; 121 of the cylindrical support 31 facing the inner peripheral surface of the leading pipe 6. A cylindrical water-stopping member 171 provided so as to extend from the outer peripheral surface toward the rear end of the outer peripheral surface, and a water-stopping member provided so as to protrude from the left inner surface 6c and the right inner surface 6d of the top pipe 6 A pressing portion 173; 173, the outer circumferential surface 172 of the cylindrical water-stopping member 171 positioned on the curved convex surface 121; 121 of the cylindrical support 31 and the curved concave surface 111; 111 are in surface contact; and The curved convex surface 121; 121 of the support 120 is swung in the direction along the curved concave surface 111; 111 from the state in which the front portions 175; 176 of the cylindrical water-stopping member 171 and the water-stopping member pressing portion 173; When it is made to be, the cylindrical water stop member 1 1 is formed by a compact surface contact between the outer peripheral surface 172 and the curved concave surface 111; 111, and a water stop portion is formed to maintain water tightness between the curved convex surface 121; 121 and the curved concave surface 111; 111. Since the front portions 175; 176 of the member 171 and the water stop member pressing portions 173; 173 are brought into contact with each other to be in a compacted state, the left inner surface 6c and the right inner surface 6d of the leading pipe 6 and the support 120 facing the inner surface A water stop portion that maintains water tightness between the left outer surface 126 and the right outer surface 127 is formed.
That is, the tubular water blocking member 171 is placed on the front outer peripheral surface including the curved convex surface 121; 121 of the cylindrical support 31 so as to extend from the front end of the outer peripheral surface toward the rear end of the outer peripheral surface. Since it is provided, it is not necessary to form a plurality of annular mounting grooves for mounting a plurality of annular water blocking members on the outer peripheral surface of the support as in the prior art, and the manufacturing cost of the cylindrical support 31 is reduced. It is possible to reduce the cost, and the surface contact state between the outer peripheral surface 172 of the cylindrical water-stopping member 171 and the curved concave surface 111; 111, and the front portion 175; 176 of the cylindrical water-stopping member 171 and the water-stopping member pressing portion. 173; By forming a compacted state by abutting with 173, it is possible to provide the pipe installation device 1 that can sufficiently maintain the watertight performance between the outer peripheral surface of the cylindrical support 31 and the front inner peripheral surface.

  According to the pipe installation device 1 of the first embodiment, the friction between the lower inner surface 6b of the front pipe 6 and the lower surface of the support body is reduced on the lower surface of the support body 120 that faces the lower inner surface 6b that is lower when the front pipe 6 is installed. Since the wheel 190 is provided as a projection for causing the pipe installation device 1 to be provided, the pipe installation device 1 capable of easily collecting the support 120 and the rotary excavation body 46 after completion of the pipe installation operation can be provided.

Embodiment 2
In the first embodiment, the left inner surface 6c and the right inner surface 6d of the leading pipe 6 are opposed to the inner surface by abutment between the front portions 175; 176 of the cylindrical water stopping member 171 and the water stopping member pressing portions 173; 173. 120 is formed as a water stop portion that maintains water tightness between the left outer surface 126 and the right outer surface 127, but without providing the water stop member pressing portion 173; 173, the curved convex surface of the cylindrical support 31 121; 121 and 121. The left inner surface 6c and the right of the leading pipe 6 are brought into contact with the outer circumferential surface 172 of the cylindrical water-stopping member 171 fixed to the front outer circumferential surface including 121; 121 by the left inner surface 6c and the right inner surface 6d of the leading pipe 6. You may make it form the water stop part which maintains the watertightness between the inner surface 6d and the left outer surface 126 and the right outer surface 127 of the support body 120 facing the inner surface.
Even in this configuration, it is not necessary to form a plurality of annular mounting grooves for mounting a plurality of annular water blocking members on the outer peripheral surface of the cylindrical support 31, and the manufacturing cost of the cylindrical support cylinder can be reduced. In addition, it is possible to provide a pipe installation device configured to sufficiently maintain the watertight performance between the outer peripheral surface of the cylindrical support and the inner peripheral surface of the pipe against high water pressure from the excavation side.

Embodiment 3
In the first embodiment, the upper inner surface 6a and the lower inner surface 6b facing each other parallel to each other on the inner surface on the front side that is the one end opening 6t side of the leading pipe 6 are provided with curved concave surfaces 111; Although the pipe installation device 1 configured to be able to swing the rotary excavator 46 in the left-right direction is illustrated, the front inner surface on the front end 6t side of the top pipe 6 is parallel to each other. The left inner surface 6c and the right inner surface 6d facing each other are provided with curved concave surfaces 111; 111 so that the rotary excavator 46 can be swung left and right, and the rotary excavator 46 can be swung vertically. It is good also as a pipe | tube installation apparatus comprised by these.

Embodiment 4
The friction reducing device may be constituted by a simple protrusion.
For example, the curved convex surface 121 that forms the lower outer surface of the cylindrical support 31 that faces the lower inner surface 6b of the top tube 6, one or a plurality of protrusions that contact the lower inner surface 6b of the top tube 6 in a dotted manner, or the head A configuration in which one or a plurality of rod-like protrusions extending along the center line 6x of the tube 6 may be provided. When such a rod-like projection is provided, the cylindrical support 31 is moved when the cylindrical support 31 is moved along the center line 6x of the leading pipe 6 on the lower inner surface 6b of the leading pipe 6. 31 becomes difficult to incline in the front-rear direction, and the cylindrical support 31 can be easily moved.

Embodiment 5
A spherical body called a ball caster or the like configured so that the spherical body freely rotates as a friction reducing device on the curved convex surface 121 that forms the lower outer surface of the cylindrical support 31 facing the lower inner surface 6b of the leading pipe 6. It is good also as a structure which provided the wheel or one or more.

Embodiment 6
The curved surfaces of the curved concave surface 111 and the curved convex surface 121 do not have to be complete circular arc surfaces, and may be elliptical arc surfaces, for example. When the curved concave surface 111 and the curved convex surface 121 are formed by elliptical arc surfaces, the curved concave surface 111 is orthogonal to the left inner surface 6c and the right inner surface 6d (the other pair of inner surfaces facing each other in parallel) of the top tube 6. The curved convex surface 121 is formed by a member that forms an outer peripheral surface of a predetermined angular range around the center line in a virtual elliptic cylinder having a center line, and the curved convex surface 121 has a center line orthogonal to the left inner surface 6c and the right inner surface 6d of the top tube 6. It is formed by the outer peripheral surface of a predetermined angle range around the center line in the virtual elliptical cylinder.

Embodiment 7
A pair of curved concave surfaces 111; 111 and a curved convex surface 121; 121 guided by the curved concave surfaces 111; 111 are not provided, but a support rotation support portion 124; 124 is provided and the upper end portion and the lower end portion of the support body 120 are moved back and forth. The rotary excavator 46 may be configured to be swingable in the vertical direction by swinging in the direction.
With this configuration, the support 120 is configured to be rotatable via the support rotation support portion 124; 124, so that the tubular water-stop member 171 fixed to the outer peripheral surface of the support 120 and the top pipe It is possible to equalize the contact pressure between the upper inner surface 6a and the lower inner surface 6b of the cylinder 6, and the cylindrical water stop member 171 positioned under the support 120 by the gravity load and the lower inner surface 6b of the leading pipe 6 Since it is possible to suppress the contact pressure from becoming excessive and a large load is required to swing the support 120 due to an increased load when the support 120 is swung, the support 120 can be suppressed. Can be accurately swung in the front-rear direction, which is the desired direction, with a small force, and the rotary excavator 46 can be swung accurately in the up-down direction, which is the desired direction, with a small force. Become.
Moreover, it can suppress that the cylindrical water stop member 171 deteriorates early by the increase in frictional resistance.
Furthermore, when it is configured not to include a mechanism for swinging the rotary excavator 46 to the left and right, for example, a rectangular flat plate-shaped partition board as a support having an outer peripheral surface corresponding to the inner peripheral surface of the leading pipe 6; The partition board is provided with a stopper / propulsion receiving part for restricting the forward movement of the partition board and receiving a propulsive force transmitted from the partition board to the leading pipe. What is necessary is just to set it as the structure which fixed the water stop members, such as the cylindrical water stop member which surrounds the said outer peripheral surface, or an annular water stop member, to the outer peripheral surface of the said partition board | substrate. In this case, when the partition wall substrate swings, the upper and lower water stop members of the partition wall substrate are pressed against the upper inner surface 6a and the lower inner surface 6b of the top tube 6 to form a water stop portion, and the left and right water stop members of the partition wall substrate A water stop portion is configured by surface contact between the left inner surface 6c and the right inner surface 6d of the leading pipe 6.
According to this configuration, the partition wall substrate is configured to be rotatable via the support rotation support portion 124; 124, so that the water blocking members above and below the partition wall substrate and the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6 are provided.
The contact pressure between the water stop member under the partition wall substrate and the lower inner surface 6b of the top tube 6 becomes excessive due to the gravity load, and the partition wall substrate is swung. It is possible to prevent the bulk load from becoming large and requiring a large force, so that the partition board can be accurately swung in the front-rear direction, which is a desired direction, with a small force, and the rotary excavator 46 can be accurately swung with a small force in the desired vertical direction.
Moreover, it becomes possible to suppress the water-stopping member from being deteriorated early due to an increase in frictional resistance.

Embodiment 8
A pair of curved concave surfaces 111; 111 and curved convex surfaces 121; 121 guided by the curved concave surfaces 111; 111 may be provided, and the support rotation support portion 124; 124 may not be provided. Even in this case, since the pair of curved concave surfaces 111; 111 are smoothly continuous with the upper inner surface 6a and the lower inner surface 6b of the leading tube 6, the curvature radius of the curved convex surfaces 121; 121 of the support 120 can be increased. The upper and lower ends of the support 120 can be swung back and forth along the curved concave surface 111; 111 with a small force, and the rotary excavator 46 is connected to the other pair of inner surfaces of the top pipe 6 facing each other in parallel. The left inner surface 6c and the right inner surface 6d can be swung vertically.
Furthermore, even in the case of a configuration that does not include a mechanism for swinging the rotary excavator 46 to the left and right, for example, a rectangular flat plate-shaped partition board as a support having an outer peripheral surface corresponding to the inner peripheral surface of the leading pipe 6 and And a stopper / propulsion receiving portion for restricting the forward movement of the bulkhead substrate and receiving a propulsive force transmitted from the bulkhead substrate to the leading pipe. The rotary excavator 46 is connected to the bulkhead substrate via the connecting strut portion 40. And a water stop member such as a cylindrical water stop member or an annular water stop member surrounding the outer peripheral surface may be fixed to the outer peripheral surface of the partition wall substrate. In this case, when the partition wall substrate swings, the upper and lower water stop members of the partition wall substrate are pressed against the upper inner surface 6a and the lower inner surface 6b of the top tube 6 to form a water stop portion, and the left and right water stop members of the partition wall substrate A water stop portion is configured by surface contact between the left inner surface 6c and the right inner surface 6d of the leading pipe 6.
Even in this case, since the pair of curved concave surfaces 111; 111 are smoothly continuous with the upper inner surface 6a and the lower inner surface 6b of the leading pipe 6, the radius of curvature of the curved convex surface of the partition substrate can be increased. The curved convex surface of the substrate can be swung in the front-rear direction along the curved concave surface 111; 111, and the rotary excavator 46 can be swung in the vertical direction with a small force.

Embodiment 9
The left inner surface 31c and the right inner surface 31d of the cylindrical support 31 are formed in a curved concave surface that is curved along the center line of the cylinder of the cylindrical support 31, and the support substrate 30 is formed so as to correspond to the curved concave surface. When the left and right outer surfaces 30a; 30b of the flat plate are formed as curved convex surfaces, the curvature radius of the curved concave surface and the curvature radius of the curved convex surface are the same, and a space between the curved concave surface and the curved convex surface is formed. You may make it maintain a watertight state by an annular water stop member. In other words, the annular water stop member may be provided in place of the bellows tubular water stop member 161.
Moreover, it is good also as a structure provided with the double water stop member of the said annular water stop member and the bellows cylindrical water stop member 161. FIG. In this case, the reliability of watertight performance can be improved by the double water blocking member.
Further, instead of the bellows tubular water blocking member 161, a cylindrical water blocking member having excellent shape retention performance when stretched may be used.
In the first embodiment, one end opening edge 162 side of the bellows tubular water blocking member 161 as the tubular water stopping member 161 is fixed to the front opening edge 163 of the cylindrical support 31, and the bellows cylindrical water stopping member 161. Although the example in which the other end opening edge 164 side of the cylinder is fixed to the outer peripheral edge 165 side of the front surface 30f of the support substrate 30 is shown, the other end opening edge side of the cylinder of the cylindrical water blocking member is connected to the front surface 30f of the support substrate 30. You may fix to the center side. That is, water can be supplied to the front surface 30 f side of the support substrate 30 through the water supply pipe holding through hole 15, and excavation sludge taken into the front surface 30 f side can be discharged through the mud pipe holding through hole 14. At the same time, the muddy water contained in the excavation slip taken into the front surface 30f side of the support substrate 30 moves to the rear of the support substrate 30 via the space between the outer peripheral surface of the support substrate 30 and the inner peripheral surface of the cylindrical support 31. If this can be prevented, the other end opening edge side of the cylindrical water-stopping member may be fixed anywhere on the front surface 30f of the support substrate 30.

  In addition, you may use the excavation machine 26 provided with the rotary excavation body 46 or 3 or more.

Moreover, the pipe | tube 2 should just be a thing with a square cross-sectional shape. In addition, the cross-sectional shape referred to in the present invention is a quadrangular shape such as a cross-sectional rectangle, a cross-sectional square, and a cross-sectional trapezoid, and includes a shape in which square corners are chamfered.
When the trapezoidal tube 2 is used, the pair of curved concave surfaces are perpendicular to the center line of the tube and are parallel to the inner surface of the tube and extend in the vertical direction of the tube across one pair of surfaces of the tube. Around the center line of a virtual cylinder or elliptical cylinder that has a center line that is perpendicular to the line or the center line of the tube and is parallel to the inner surface of the tube and extends in the left-right direction of the tube across the other pair of surfaces of the tube What is necessary is just to form with the member which forms the outer peripheral surface of the predetermined angle range.

  In addition, the subsequent pipe is not connected to the rear end of the pipe that is first inserted into the ground, and only the pipe that is first inserted into the underground 10 from the starting base 100 is installed in the underground 10 and is then inserted into the underground 10. You may make it form the support work etc. by only a pipe | tube (namely, one pipe | tube).

1 pipe installation device, 2 pipes, 6 top pipe (pipe), 6t one end opening, 10 underground,
30 support substrate, 31 cylindrical support, 46 rotary excavation body,
161 A bellows tubular water stop member (tubular water stop member).

Claims (3)

A tube having a rectangular cross section, a rotating excavator that rotates about a rotation center line that is positioned in front of one end opening of the tube and intersects the propulsion direction of the tube, and a support device that supports the rotating excavator on the tube; In a pipe installation device for propelling a pipe and installing it in the ground by applying a driving force to the rotary excavation body and the pipe while rotating the rotary excavation body and excavating a natural mountain by rotating the rotary excavation body,
The support device includes a support body that rotatably supports the rotary excavation body, and a tubular water stop member that can be expanded and contracted,
The support body supports the rotary excavator and the cylindrical support body installed on the front side in the pipe so that the center line of the cylinder extends along the center line of the pipe, and swings inside the cylindrical support body. A plate-like support substrate supported movably,
The rotary excavation body is connected to the support substrate via a support column provided so as to protrude forward from the front surface of the support substrate.
The support substrate is attached to the cylindrical support so that the pair of outer surfaces facing the other pair of inner surfaces of the pipe can swing in the front-rear direction of the cylindrical support, and the rotary excavator faces the pipes parallel to each other. It is configured to be swingable in a direction perpendicular to the other pair of inner surfaces,
The cylindrical water stop member has one end opening edge of the cylinder fixed to the one end opening edge of the cylindrical support body, and the other end opening edge of the cylinder is fixed to the front surface of the support substrate. A tube installation device characterized in that the member is configured to prevent water from moving to the rear of the cylindrical support member between the inner surface of the cylindrical support member and the outer surface of the support substrate.   The cylindrical water stop member is characterized in that one end opening edge of the cylinder is fixed to one end opening edge of the cylindrical support body, and the other end opening edge of the cylinder is fixed to the outer peripheral edge side of the front surface of the support substrate. The pipe installation device according to claim 1.   The tube installation device according to claim 1 or 2, wherein the tubular water stop member is a bellows tubular water stop member.

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